Defination Intracranial venous malformations are abnormally enlarged veins in brain. Venous malformations are a type of blood vessel abnormality in the brain or spinal cord.
The incidence of AVM is estimated at one in 100,000 and the prevalence is estimated at 18 in 100,000. An estimated two-thirds of AVMs occur before age 40. Every year, about four out of every 100 people with an AVM will experience a hemorrhage. Each hemorrhage poses a 15- to 20-percent risk of death or stroke, 30-percent neurological morbidity, and 10-percent mortality. When hemorrhage occurs, it affects the following regions statistically: intracerebral (41%), subarachnoid (24%), intraventricular location (12%) and various combinations (23%).
The most important goal AVM treatment is to prevent internal bleeding from rupture, because which can lead to stroke / death. However, seizure control or stabilization of progressive neurological deficits are occasionally treatment goals. Though medication may be prescribed, it does not cure AVMs but medications are used to control pain and seizures.